# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 2)

2.

If

*h*is the difference in level between end points separated by*l*, then the slope correction is . The second term may be neglected if the value of*h*in a 20 m distance is less thanDiscussion:

67 comments Page 1 of 7.
NARDOS TEFERI said:
1 year ago

For slope (M) up to 20%.

According to me, the solution is;

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

According to me, the solution is;

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

(9)

Chaan A said:
2 years ago

Explain it clearly.

(5)

Aazad said:
3 years ago

Second term will be neglected when h=3cm not 3meter for length 20 meter.

(3)

Mukesh das said:
3 years ago

How it will be 3m?

Please explain clearly with the completed formula.

Please explain clearly with the completed formula.

(3)

Mukesh das said:
3 years ago

How it will be 3m?

Please explain clearly with the completed formula.

Please explain clearly with the completed formula.

(4)

Dev Narayan Yadav said:
3 years ago

l = 20 m.

H2 = 2l,

H2 = 2*20,

H2 = 40.

And;

H = 6.32 or 6.33,

√40 = 6.32.

H2 = 2l,

H2 = 2*20,

H2 = 40.

And;

H = 6.32 or 6.33,

√40 = 6.32.

(5)

Khagendra said:
4 years ago

For slope (M) up to 20%.

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

Here the nearest one is 3m.

So 3m is the appropriate answer.

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

Here the nearest one is 3m.

So 3m is the appropriate answer.

(14)

Kartabo Ketema said:
4 years ago

How it will be 3m? Explain it with the formula.

Nandhu said:
4 years ago

The second term can be negleted only if the slopes flatter than 1 in 25..

That means 4%.

i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.

So option A is right.

That means 4%.

i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.

So option A is right.

(4)

Fayez abusafaqa ps said:
4 years ago

The error can be accepted upto 10%. thus, the second term divided by the correlational factor equal 0.1.

Assuming the first term is x and the second term is y. Then y/x+y=0.1==> x+y/x=10 with y not zero==>1+x/y=9==>y=9. solve it u will get l=3.

Assuming the first term is x and the second term is y. Then y/x+y=0.1==> x+y/x=10 with y not zero==>1+x/y=9==>y=9. solve it u will get l=3.

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